San Diegans can expect a minor hike in daytime high temperatures today and Friday, following suit with the city’s coastal areas nearing average temps. At the same time, inland spots are set to sizzle at around 5 degrees above the norm, according to the National Weather Service. Temperatures at the coast will linger in the mid to upper 60s while the valleys bask in the 70s and lower 80s, as reported by the National Weather Service forecast.

But hold onto your hats, folks—the weekend promises to stir up some climactic drama. The mercury is slated to dip slightly for our coastal and valley dwellers on Friday, courtesy of a perky onshore breeze, but an express low-pressure system charging through California Saturday night is gunning to upend the usual warm serenity, with potential temperatures plummeting up to 20 degrees below average in the mountains come Sunday. This report comes straight from NWS San Diego.

Weather aficionados should brace for "stronger and gusty southwest to west winds for the mountains and deserts for late Saturday into Sunday," states the Area Forecast Discussion, warning of gusts ramping up to a formidable 55 to 65 mph. Outdoor plans in these areas may need a rethink, with wind powerhouses likely to enter Saturday afternoon and stay the top-billed act until nightfall on Sunday.

Even the parched deserts and stony peaks won’t be immune to the whims of the fleeting low-pressure system – Sunday's scorcher could be a rather chilled affair as temperatures across the region are expected to take a notably cooler turn. The maritime community isn’t spared either; from Saturday morning, boaters should anticipate the arrival of blustery conditions that could rock the boat, especially in the ocean's outer reaches. While gale-force winds appear unlikely, the NWS marine update still advises caution.

So, as the climate roulette spins this weekend, San Diegans should remain vigilant. While precipitation prospects are slim, with any showers predicted to be as light as the city's famous sea breezes, NWS urges locals to stay weather-aware, saying, "Skywarn activation is not requested. However weather spotters are encouraged to report significant weather conditions." Ready or not, it looks like San Diego is set for a swirling end to the week followed by a much calmer Monday through Wednesday, dry and warmer though still a touch cooler than average.